损伤容限设计方法和设计数据

Design methods and design data for damage tolerance

论述了损伤容限设计方法 ,研究了长裂纹的疲劳裂纹扩展寿命估算方法和初始裂纹尺寸a0 的确定方法。并提供了常用国产机械材料的疲劳裂纹扩展速率和疲劳裂纹扩展门槛值的试验数据。

This paper discussed the des igning method of damage tolerance,studie d the life evaluation method of fatigue crack extension of long cracks and the d etermining method of dimension ao of ini tial crack. It also provided the fatigue crack growth rate of the commonly used Chinese mechanical materials and the tes t data of the threshold in fatigue crack extension